Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
Join Date: Sep 2008
Location: Williamsburg VA.
Posts: 196
83 911 Brake trouble!!!! I need Help!

Greetings to all. I purchased a 1983 911 targa from a friend a month ago. During the 16 plus years he owned the car it was troubled with problems and spent most of the time in the garage. I love a challenge so I bought the car from him. When I got it the brakes did not work ....at all. The pedal went right to the floor. I found one of the lines from the reservoir had a leak. I changed it and flushed the brake system. I spent a whole day trying to get them to build up pressure but no luck. They will apply pressure to the pads but not pressure to the pedal. I checked some forums and the repair manual and all pointed to the Master Cylinder. I replaced it with one purchased on-line. Still no luck and several folks said it was more than likely a bad rebuilt unit. SO I replaced it with a brand new ATE $220 thank you very much. I have tried using the $5 low pressure bleeder and still am not getting pressure to build on the brake pedal. If you pump 5-6 times rapidly you will get very little pressure but then if you pump slowly it goes right to the floor. There is not a drop of fluid anywhere on the ground under the car. I am getting beat on this one and could use some help.

Old 09-04-2008, 05:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
Jubbie's Avatar
 
Join Date: Jun 2004
Location: Friendswood, TX
Posts: 500
Brake booster?

Mine doesn't have one and I am not sure they fail that way, but it is the only other thing that may be in common with the failure. I know in bleeding my Dad's long hood that you had to let it sit over night between pedal pumping bleeding to let it statically bleed itself, but there again, I always got pressure.

Good luck
__________________
John F. Lewis

74' 911S Targa + 930/02
76' 914 - Eternal Type IV project FOR SALE
Old 09-04-2008, 05:47 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,700
What is the bleeding sequence you are using? You want to start the furthest from the m/c, which is right rear, then left rear, then right front and left front. If that is the way you've been doing it, then have a look at the calipers and make sure the bleed screws are at the top of each caliper. They can be mistakenly put on incorrectly, left to right and be upside down.

Are you having to add fluid? If you see no drips but are losing fluid, you could be pumping into the booster. The other issue is you could have a bad booster diaphram and not be building pressure.
__________________
Tony G
2000 Boxster S
Old 09-04-2008, 05:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered
 
Join Date: Sep 2008
Location: Williamsburg VA.
Posts: 196
thanks, The bleed screws in the rear are on top BUT the front are on the bottom. Could this be causing a problem?
Old 09-04-2008, 06:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,700
Quote:
Originally Posted by 83targa View Post
thanks, The bleed screws in the rear are on top BUT the front are on the bottom. Could this be causing a problem?
Air wants to go up! The bubbles are trapped and the fluid continues to pour out. Take the fronts off and switch them right to left. Rebleed. If there are no leaks and with a new m/c, you should have brakes that will stop the car.
What fluid are you using?
__________________
Tony G
2000 Boxster S

Last edited by tonythetarga; 09-05-2008 at 04:13 AM..
Old 09-04-2008, 06:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Moderator
 
Bill Verburg's Avatar
 
Join Date: Dec 2000
Posts: 26,436
Garage
Quote:
Originally Posted by 83targa View Post
thanks, The bleed screws in the rear are on top BUT the front are on the bottom. Could this be causing a problem?
it's certainly part of the problem. There is absolutly no way to bleeed a caliper which has the bleeds on the bottom.

The fronts have been mounted upside down!
__________________
Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
| Pelican Home |Rennlist Wheels |Rennlist Brakes |
Old 09-04-2008, 06:07 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered
 
Join Date: Sep 2008
Location: Williamsburg VA.
Posts: 196
That's a breath of fresh air.THANKS. I will give that a go first thing in the morning. I am using a super duty DOT 4 made in Germany. Fluid was purchased fro BAP-Gieon. Any better recomendation on the fluid as I am sure I will go through another large jug when I re bleed the system.
Like I said the car has had issues and I am sure I will be on this site....ALOT!!!!! I want to get the car moving then work on the other issues.
Old 09-04-2008, 06:17 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Moderator
 
Bill Verburg's Avatar
 
Join Date: Dec 2000
Posts: 26,436
Garage
For street use ATE 200(yellow or blue) or Castrol LMA are going to be fine
__________________
Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
| Pelican Home |Rennlist Wheels |Rennlist Brakes |
Old 09-04-2008, 06:20 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered
 
Join Date: Sep 2008
Location: Williamsburg VA.
Posts: 196
That was it! Thanks so much for the help on this one!
Old 09-05-2008, 11:17 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered
 
Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,700
OK, now that this problem is out of the way, time to post a picture of the car. It is also helpful to identify where you are (as in the location under your user name). You never know, you may actually find people near you that could help out or also find events in your area you might be interested in attending. Pretty soon you'll find out about DE's and then you're done for...slippery slope here we come!
__________________
Tony G
2000 Boxster S
Old 09-05-2008, 11:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered
 
MBAtarga's Avatar
 
Join Date: Jul 2001
Location: Lawrenceville GA 30045
Posts: 7,380
I'm impressed with you guys! This car has been sitting/not driven for who knows how long with "bad brakes", and tonythetarger nails the cause within 13 minutes of the original post.

Oh - and 83targa - along with tony's suggestion on the location, consider adding your first name to your signature.
__________________
Mark

'83 SC Targa - since 5/5/2001
'06 911 S Aerokit - from 5/2/2016 to 11/14/2018
'11 911 S w/PDK - from 7/2/2021 to ???
Old 09-05-2008, 01:22 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered
 
Join Date: Sep 2002
Location: Central Virginia
Posts: 414
Thumbs up

Mark,
You will be amazed at the years of amassed experience on this board. If you ever are puzzled by something you should always consider throwing the question out to the crew here.

Nowhere else will you find so much Porsche-specific knowledge at your fingertips!

Paul

__________________
Paul
'87 Carrera cab; '19 Ford Flex for the Dane and Lab; '17 Tacoma for truck stuff.
'96 993 cab (gone, oops); '82 SC (gone)
Old 09-06-2008, 04:26 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Reply


 


All times are GMT -8. The time now is 09:32 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.